CN220065866U - Cover plate assembly and battery - Google Patents

Abstract

The utility model provides a cover plate assembly and a battery, wherein the cover plate assembly comprises: the device comprises a cover plate, a pole and an insulating structure, wherein a mounting hole is formed in the cover plate, a first stop structure is arranged on the first surface of the cover plate, the first stop structure comprises a groove, a step part protruding towards the inside of the groove is formed at the bottom of the groove, and the top surface of the step part is a transition surface; the pole is arranged in the mounting hole, and an accommodating space is formed between the pole and the inner wall of the mounting hole; the insulation structure separates the pole with the mounting hole, the insulation structure includes first insulating piece, first insulating piece including set up in sleeve portion in the accommodation space and extend to the turn-ups portion of apron, turn-ups portion is provided with the second stop structure, the second stop structure with first stop structure mutually block. The utility model is used for improving the insulation performance between the pole and the cover plate.

Description

Cover plate assembly and battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a cover plate assembly and a battery.

Background

Along with the development of clean energy, a power battery and an energy storage battery are rapidly developed, and the power battery is widely applied to plug-in hybrid electric vehicles, hybrid electric vehicles and pure electric vehicles. The energy storage battery is mainly used for solar power generation equipment and wind power generation equipment and storing renewable energy.

However, the cover plate assembly is an important component of the power battery and the energy storage battery, the existing cover plate assembly has complex assembly process and needs more parts, and in the working process of the battery, some parts on the cover plate assembly often have movable phenomena, especially the top cover, the upper plastic and the pole are mutually slid two by two, so that the insulation performance between the pole and the cover plate is affected, and bad consequences such as battery short circuit are caused.

Disclosure of Invention

The utility model provides a cover plate assembly and a battery, which are used for improving the insulation performance between a pole and a cover plate.

In order to achieve the above object, the present utility model provides a cover plate assembly comprising:

the mounting hole is formed in the cover plate, a first stop structure is arranged on the first surface of the cover plate, the first stop structure comprises a groove, a step part protruding towards the inside of the groove is formed at the bottom of the groove, and the top surface of the step part is a transition surface;

the pole is arranged in the mounting hole, and a containing space is formed between the pole and the inner wall of the mounting hole;

the insulation structure separates the pole with the mounting hole, the insulation structure includes first insulating piece, first insulating piece including set up in sleeve portion in the accommodation space and extend to the turn-ups portion of apron, turn-ups portion is provided with the second stop structure, the second stop structure with first stop structure mutually clamped.

According to the cover plate assembly provided by the embodiment of the utility model, the first stop structure is arranged on the first surface of the cover plate, the second stop structure is arranged on the flanging part, and the second stop structure and the first stop structure are mutually clamped, so that the first insulating part can be prevented from being deformed in torsion in the mounting hole, good insulating performance is ensured, and the yield of the cover plate assembly in the assembly process is improved. The transition surface is formed on the top surface of the step part, so that the attachment area of the second stop structure can be increased, the stability of the first insulating part is improved, the problems of pole loosening and the like are prevented, and the insulating performance is improved.

In one possible implementation, the step portion is connected to an inner wall of the groove on one side close to the mounting hole;

the second stop structure comprises a clamping protrusion extending into the groove and a connecting part abutting against the transition surface.

In one possible embodiment, the transition surface is lower than the first surface of the cover plate; and/or the number of the groups of groups,

the surface of the transition surface facing the second stop structure is an inclined surface, and the distance between the transition surface and the first surface of the cover plate is gradually increased along the radial direction of the mounting hole towards the direction away from the center of the mounting hole.

In one possible implementation, the edge of the mounting hole is provided with a chamfer portion, one end of the transition surface is connected to one side of the chamfer portion, which is far away from the mounting hole, and a step is formed between the other end of the transition surface and the bottom surface of the groove.

In one possible embodiment, the outer circumferential surface of the pole is provided with a third stop structure, the inner wall surface of the sleeve part is provided with a fourth stop structure, and the third stop structure and the fourth stop structure are mutually embedded;

one of the third stop structure and the fourth stop structure is a protruding part, and the other one is a stop groove.

In one possible embodiment, the first stop structures are a plurality of, and the first stop structures are spaced apart from each other along the circumferential direction of the mounting hole.

In one possible implementation, the distance between the first face of the cover plate and the second face of the cover plate is T, the transition face is lower than the first face of the cover plate, and the distance between the transition face and the first face of the cover plate is L1, wherein L1/T is more than or equal to 5% and less than or equal to 50%, T is more than or equal to 0.2mm and less than or equal to 4mm, and L1 is more than or equal to 0.01mm and less than or equal to 2mm.

In one possible implementation, the dimension L3 of the groove along the radial direction of the mounting hole is more than or equal to 0.1mm; and/or the number of the groups of groups,

the dimension of the transition surface along the radial direction of the mounting hole is L2, wherein L2 is more than or equal to 0.1mm and less than or equal to 10mm.

In one possible implementation manner, the center of the mounting hole is taken as the center of the circle, the central angle theta corresponding to each groove is more than or equal to 20 degrees, and the sum of the central angles theta corresponding to a plurality of grooves accounts for 20% -80% of the circumferential direction 360 degrees of the mounting hole.

In one possible embodiment, the distance between the bottom of the groove and the first face of the cover plate is H1, wherein H1/T is 10-80%, H1 is 0.1 mm-3 mm.

In one possible implementation manner, a blocking table is formed between two adjacent grooves, and the size of the blocking table along the radial direction of the mounting hole is L5, wherein L5 is more than or equal to 0.1mm and less than or equal to 10mm;

the interval between the blocking table and the chamfer part is larger than 0; and/or the number of the groups of groups,

the one end that separates the platform is close to chamfer portion sets up the fillet, the radius of fillet is R1, and 0.1mm is less than or equal to R1 is less than or equal to 5mm.

In one possible implementation, both ends of the pole extend to the outer side of the mounting hole, the first end of the pole is provided with a first flange, and a distance L6 is arranged between the end of the pole, which is opposite to the first flange, and the first face of the cover plate, wherein L6/T is more than or equal to 25% and less than or equal to 300%, and L6 is more than or equal to 1mm and less than or equal to 10mm.

In one possible implementation, the insulation structure further includes a second insulation member disposed on the second face of the cover plate, the second insulation member extending between the first flange and the cover plate; and a sealing ring is further arranged between the first flange and the cover plate.

In one possible embodiment, the sealing ring is integrally connected to the first insulating element.

In one possible embodiment, the flanging portion has an outer diameter D1, wherein: D1/T is more than or equal to 20% and less than or equal to 80%, D1 is more than or equal to 35mm and more than or equal to 10mm;

the minimum diameter of the pole is D2, and D1/D2 is more than or equal to 1.1.

In one possible implementation, D1/D2 is ≡1.5.

The utility model also provides a battery, which comprises a shell, a battery core and the cover plate assembly, wherein the cover plate assembly is connected with the shell, an inner cavity is formed in the shell, and the battery core is arranged in the inner cavity.

According to the cover plate assembly and the battery, in the process of using or transporting the battery, if liquid such as water drops falls to the cover plate assembly, the transition surface can play a role in drainage, the liquid is guided into the groove, the situation that the liquid falling to the cover plate assembly flows into the battery along the polar column is prevented, and the use safety of the battery is improved.

In addition to the technical problems, technical features constituting the technical solutions, and beneficial effects caused by the technical features of the technical solutions described above, other technical problems that can be solved by the cover plate assembly and the battery provided by the embodiments of the present utility model, other technical features included in the technical solutions, and beneficial effects caused by the technical features are described in detail in the detailed description.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic perspective view of a cover plate assembly according to an embodiment of the present utility model;

FIG. 2 is a top view of a cover plate assembly according to an embodiment of the present utility model;

FIG. 3 is a cross-sectional view taken along section A-A of FIG. 2;

FIG. 4 is an enlarged view of the structure at B of FIG. 3;

fig. 5 is a schematic perspective view of a cover plate of the cover plate assembly according to an embodiment of the present utility model;

FIG. 6 is an enlarged view of the structure at C of FIG. 5;

FIG. 7 is a top view of a cover plate of the cover plate assembly provided by an embodiment of the present utility model;

FIG. 8 is a cross-sectional view of FIG. 7 in the mounting hole and first stop feature positions;

FIG. 9 is a schematic perspective view of FIG. 8;

FIG. 10 is a top view of FIG. 8;

FIG. 11 is a schematic view of a further perspective structure of FIG. 8;

fig. 12 is a schematic perspective view of a first insulating member of a cover assembly according to an embodiment of the present utility model;

FIG. 13 is a schematic view of a third perspective view of a first insulating member of a cover assembly according to an embodiment of the present utility model;

fig. 14 is a schematic perspective view of a pole of a cover assembly according to an embodiment of the present utility model.

Reference numerals illustrate:

10-cover plate;

11-mounting holes;

12-chamfer part;

13-a first stop structure;

131-step;

132-grooves;

133-transition surface;

14-explosion-proof holes;

15-a barrier station;

16-a liquid injection hole;

20-pole;

21-a first flange;

22-a stop groove;

23-a second flange;

30-a first insulating member;

31-a sleeve portion;

311-bosses;

312-a central hole;

32-a flanging part;

40-a second stop structure;

41-clamping convex;

42-connecting part;

50-a second insulator;

60-explosion-proof valve;

70-sealing ring.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present utility model, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the use process of the battery, the phenomenon of vibration of the cover plate assembly can occur frequently, and the problems of insulation failure and the like between the pole and the cover plate can be caused, so that the safety and the reliability of the battery are affected.

In view of the above background, according to the cover plate assembly and the battery provided by the utility model, the first stop structure is arranged on the first surface of the cover plate, the second stop structure is arranged on the flanging part of the first insulating member, the second stop structure is mutually clamped with the first stop structure, the first insulating member is prevented from being deformed in torsion in the mounting hole, and the transition surface is formed by the top surface of the step part, so that the attachment area of the second stop structure can be increased, the stability of the first insulating member is improved, the good insulating performance is ensured, and the safety and reliability of the battery are improved.

The following describes a cover plate assembly and a battery provided by an embodiment of the present utility model with reference to the accompanying drawings.

Referring to fig. 1, 2 and 5, an embodiment of the present utility model provides a cover plate assembly, including: the cover plate 10, the pole 20 and the insulating structure, wherein the cover plate 10 is provided with a mounting hole 11, the first surface of the cover plate 10 is provided with a first stop structure 13, and referring to fig. 9, the first stop structure 13 comprises a groove 132, the bottom of the groove 132 forms a step part 131 protruding towards the inside of the groove 132, and the top surface of the step part 131 is a transition surface 133; the pole 20 is disposed in the mounting hole 11, and a receiving space is formed between the pole 20 and an inner wall of the mounting hole 11.

As shown in fig. 4 and 8, the insulating structure separates the pole 20 from the mounting hole 11, and includes a first insulating member 30, the first insulating member 30 including a sleeve portion 31 provided in the accommodating space and a burring portion 32 extending to the cap plate 10, and as shown in fig. 8 and 12, the burring portion 32 is provided with a second stopper 40, and the second stopper 40 is engaged with the first stopper 13.

According to the cover plate assembly provided by the embodiment of the utility model, the first stop structure 13 is arranged on the first surface of the cover plate 10, the second stop structure 40 is arranged on the flanging part 32, and the second stop structure 40 and the first stop structure 13 are mutually clamped, so that the first insulating part 30 can be prevented from being twisted and deformed in the mounting hole 11, good insulating performance is ensured, and the yield of the cover plate assembly in the assembly process is improved.

The second stop structure 40 and the first stop structure 13 are engaged with each other, and the second stop structure 40 and the first stop structure 13 may be in contact with each other to achieve engagement. By the transition surface 133, the attachment area of the second stop structure 40 can be increased, which is beneficial to improving the stability of the first insulating member 30, thereby preventing the loosening of the pole 20 and improving the insulating performance.

The insulation structure separates the pole 20 from the mounting hole 11, preventing the pole 20 from being in contact with the cap plate 10 to cause a short circuit, thereby improving the reliability of use.

In one possible implementation, the flange portion 32 extends to the first face of the cover plate 10.

In one possible implementation, referring to fig. 4, 12 and 13, the sleeve portion 31 and the burring 32 are connected to each other, for example, the sleeve portion 31 and the burring 32 are integrally formed as a single piece. The sleeve portion 31 is sleeved in the mounting hole 11, the central hole 312 is formed in the sleeve portion 31, the pole 20 is located in the central hole 312, and the pole 20 is prevented from contacting the inner wall of the mounting hole 11, so that stable insulation between the cover plate 10 and the pole 20 is achieved.

In one possible embodiment, the flange portion 32 is connected to one end of the sleeve portion 31, and the flange portion 32 extends away from the central hole 312, so that the flange portion 32 can further prevent the terminal post 20 from contacting the cap plate 10, and ensure insulation performance.

In one possible implementation, the cover plate 10 may be made of aluminum material, and has conductivity.

In one possible implementation, referring to fig. 10, 11 and 12, the stepped portion 131 is connected to an inner wall of one side of the recess 132 near the mounting hole 11. The second stopping structure 40 is matched with the first stopping structure 13, the second stopping structure 40 comprises a clamping protrusion 41 extending into the groove 132 and a connecting portion 42 abutting against the transition surface 133, the connecting portion 42 abuts against the transition surface 133, the attachment area of the second stopping structure 40 is increased, the friction force between the connecting portions 42 abutting against the transition surface 133 is effectively improved, therefore, the first insulating piece 30 is prevented from being twisted, and the connection stability of the first insulating piece 30 is improved.

In one possible implementation, referring to fig. 9 and 11, the transition surface 133 is lower than the first surface of the cover plate 10.

In one possible embodiment, the surface of the transition surface 133 facing the second stop structure 40 is an inclined surface, and the distance between the transition surface 133 and the first surface of the cover plate 10 gradually increases in a direction toward a direction away from the center of the mounting hole 11 in the radial direction of the mounting hole 11.

It will be readily appreciated that in the process of using or transporting the battery, if the liquid such as water drops falls to the cover plate assembly, the transition surface 133 can play a role in drainage, guide the liquid into the groove 132, and help to prevent the liquid falling to the cover plate assembly from flowing into the battery along the pole 20, so as to improve the safety of using the battery.

In addition, the stepped portion 131 protruding toward the inside of the groove 132 is formed by the bottom of the groove 132, and the thickness of the stepped portion 131 is large, which is advantageous for increasing the strength of the first stopper 13 itself.

In one possible implementation, referring to fig. 4 and 9, the edge of the mounting hole 11 is provided with a chamfer 12, a part of the chamfer 12 may be a first surface extending to the cover plate 10, one end of the transition surface 133 is connected to one side of the chamfer 12 away from the mounting hole 11, and a step is formed between the other end of the transition surface 133 and the bottom surface of the groove 132.

The chamfer portion 12 is arranged to reduce the generation of burrs at the edge of the mounting hole 11, prevent the burrs from piercing the first insulating part 30 or preventing the burrs from falling down to cause short circuit, improve the yield and improve the safety of the battery. In addition, the chamfer 12 also plays a guiding role for the installation of the pole 20 and the first insulator 30, preventing from being caught, facilitating the assembly of the cap plate assembly.

In one possible embodiment, referring to fig. 13 and 14, the outer peripheral surface of the pole 20 is provided with a third stopper structure, the inner wall surface of the sleeve portion 31 is provided with a fourth stopper structure, and the third stopper structure and the fourth stopper structure are fitted to each other; one of the third stopper structure and the fourth stopper structure is a boss 311, and the other is a stopper groove 22.

In one possible embodiment, the third stop feature is a boss 311 and the fourth stop feature is a stop slot 22. In another possible embodiment, the third stop feature is a stop slot 22 and the fourth stop feature is a boss 311.

In one possible embodiment, referring to fig. 13 and 14, the outer peripheral surface of the pole 20 is provided with a stopper groove 22, and the inner wall surface of the sleeve portion 31 is provided with a boss 311, the boss 311 extending into the stopper groove 22. The number of the stop grooves 22 may be plural, and the positions of the protruding portions 311 correspond to the positions of the stop grooves 22, and the protruding portions 311 extend into the stop grooves 22, so that the pole 20 is prevented from rotating in the sleeve portion 31, stability of the pole 20 is improved, and yield of the cover plate assembly is improved.

In one possible embodiment, the stop groove 22 may be a triangular groove, and the protrusion 311 may be a protrusion with a triangular cross section, and of course, the stop groove 22 may be other shapes, such as a rectangular groove, and the shape of the protrusion 311 may be adapted to the shape of the stop groove 22.

In one possible embodiment, referring to fig. 5 and 6, there are a plurality of first stopper structures 13, and the plurality of first stopper structures 13 are spaced apart from each other in the circumferential direction of the mounting hole 11. As shown in fig. 4, 6 and 12, the plurality of first stop structures 13 are correspondingly engaged with the second stop structures 40, so that the stability of the connection between the first insulating member 30 and the cover plate 10 is improved, and the first insulating member 30 is prevented from twisting to affect the insulation.

In a possible embodiment, in the case that the mounting hole 11 is a circular hole, the plurality of first stop structures 13 are circularly distributed around the mounting hole 11 around the center of the mounting hole 11. Of course, the mounting hole 11 may be a rectangular hole or another hole, and the plurality of first stop structures 13 may be uniformly distributed around the mounting hole 11.

In one possible embodiment, the number of first stop structures 13 is 16. Of course, the number of the first stopper structures 13 may be 12 or 18.

In one possible implementation, referring to FIG. 8, the distance between the first face of the cover plate 10 and the second face of the cover plate 10 is T, the transition face 133 is lower than the first face of the cover plate 10, and the distance between the transition face 133 and the first face of the cover plate 10 is L1, wherein L1/T is 5% or less and 50%, T is 0.2mm or less and 4mm, and L1 is 0.01mm or less and 2mm.

In one possible embodiment, the distance L1 between the transition surface 133 and the first surface of the cover plate 10 may be 0.01mm, 0.05mm, 0.1mm, 0.5mm, 1mm, 1.5mm or 2mm. The distance between the transition surface 133 and the first surface of the cover plate 10 may be gradually increased from 0.01mm to 2mm, for example, in the direction from the mounting hole 11 to the recess 132 in the radial direction of the mounting hole 11.

The distance between the first face of the cover plate 10 and the second face of the cover plate 10 is T, i.e. the thickness of the cover plate 10 is T. In one possible implementation, T may be 0.2mm, 1mm, 1.5mm, 2mm, 2.5mm, 3mm, 3.5mm, or 4mm, and the cover plate 10 may be made of aluminum or stainless steel while securing structural strength. L1/T may be 5%, 10%, 20%, 30%, 40% or 50%, etc.

In one possible implementation, referring to FIG. 9, the transition surface 133 has a dimension L2 in the radial direction of the mounting hole 11, where 0.1 mm.ltoreq.L2.ltoreq.10mm. The size of the transition surface 133 along the radial direction of the mounting hole 11, that is, the width of the transition surface 133, in a certain range, the larger the size of the transition surface 133 along the radial direction of the mounting hole 11 is, the more beneficial to increasing the attachment area of the first insulating member 30 and the first surface of the cover plate 10, the stability of mounting the first insulating member 30 is improved, but the too large width of the transition surface 133 can affect the sealing effect of the cover plate 10, and the too small size of the transition surface 133 along the radial direction of the mounting hole 11 can cause weakening of the transition effect.

In one possible embodiment, the dimension L2 of the transition surface 133 in the radial direction of the mounting hole 11 may be 0.1mm, 1mm, 2mm, 5mm, 7mm, 8mm or 10mm. The dimension L2 of the transition surface 133 in the radial direction of the mounting hole 11 may be 0.1mm 2.

In one possible embodiment, the dimension L3 of the groove 132 in the radial direction of the mounting hole 11 is ≡0.1mm. This is to ensure that the grooves 132 function to prevent the first insulating member from twisting and to prevent the first insulating member from rotating.

In one possible implementation, the dimension L3 of the groove 132 in the radial direction of the mounting hole 11 may be 0.1mm, 0.48mm, 1mm, 1.5mm, or 2mm.

In one possible implementation, referring to fig. 10, the center of the mounting hole 11 is used as the center, the corresponding central angle θ of the groove 132 is equal to or greater than 20 °, and the length L4 of the central position of the corresponding groove 132 along the circumferential direction of the mounting hole 11 is equal to or greater than 0.5mm. This is because, since the smaller central angle θ of the groove 132 causes the effect of preventing the first insulating member from rotating to be reduced, θ is equal to or larger than 20 °, and thus the effect of preventing the first insulating member 30 from twisting can be achieved.

In one possible implementation, the sum of the central angles θ corresponding to the plurality of grooves 132 accounts for 20% -80% of the circumferential direction 360 ° of the mounting hole 11, that is, the sum of the central angles θ corresponding to all the grooves 132 accounts for 20% -80% of the circumferential direction 360 ° of the mounting hole 11, so that the stability of the connection between the first insulating member 30 and the cover plate 10 is improved.

In one possible implementation, the sum of the central angles θ corresponding to the plurality of grooves 132 accounts for 20%, 30%, 50%, 60%, 65%, 80%, or the like of 360 ° of the circumferential direction of the mounting hole 11.

In one possible implementation, the center angle θ corresponding to the groove 132 may be 20 °, 30 °, 40 °, 60 °, 70 ° or the like with the center of the mounting hole 11 as the center, and may be flexibly selected according to the number of the first stop structures 13.

In one possible implementation, the length L4 of the groove 132 in the circumferential direction of the mounting hole 11 may be 0.5mm, 1mm, 1.5mm, 2mm, 3mm, or 5mm.

In one possible implementation, referring to fig. 8 and 12, the distance between the bottom of the groove 132 and the first surface of the cover plate 10 is H1, that is, the depth of the groove 132 is H1, where T is the distance between the first surface of the cover plate 10 and the second surface of the cover plate 10, where H1/T is 10% or less and 80% or less, and 0.1mm or less and H1 is 3mm or less, which facilitates extending the catch 41 into the groove 132, preventing the catch 41 from coming out of the groove 132, and also prevents the depth H1 of the groove 132 from being too large to weaken the cover plate 10 too much, thereby ensuring the structural strength of the cover plate 10.

In one possible embodiment, the distance H1 between the bottom of the groove 132 and the first face of the cover plate 10 may be 0.1mm, 0.5mm, 1mm, 1.5mm, 2mm or 3mm.

In one possible implementation, the H1/T may be 10%, 20%, 30%, 50%, 60%, 65%, 80%, etc.

In one possible implementation, as shown with reference to fig. 9, 10 and 11, a barrier 15 is formed between two adjacent grooves 132 to facilitate process stamping and processing of the cover plate 10.

In one possible embodiment, the dimension of the blocking table 15 in the radial direction of the mounting hole 11 is L5, wherein 0.1 mm.ltoreq.L5.ltoreq.10mm. Ensuring that the barrier ribs 15 have sufficient strength to prevent twisting of the first insulating member.

In one possible implementation, the dimension of the barrier table 15 in the radial direction of the mounting hole 11 is L5, wherein 0.1 mm.ltoreq.L5.ltoreq.10mm L5 may be 0.1mm, 0.5mm, 1mm, 3mm, 5mm, 8mm or 10mm.

In one possible implementation, the spacing between the baffle table 15 and the chamfer 12 is greater than 0. And Cheng Chongya is convenient to prepare. The spacing between the baffle table 15 and the chamfer 12 may be, for example, 0.5mm, 1mm, 2mm, 3mm or 5mm.

In one possible implementation, the end of the baffle 15 near the chamfer 12 is provided with a rounded corner having a radius R1,0.1 mm. Ltoreq.R1.ltoreq.5 mm. Is convenient for stamping and forming, and has the effect of removing burrs.

In one possible implementation, the radius R1 of the fillet may be 0.1mm, 0.5mm, 1mm, 2mm, 3mm or 5mm.

In one possible implementation, referring to fig. 4, 8 and 12, both ends of the pole 20 protrude outside the mounting hole 11, the first end of the pole 20 has a first flange 21, an end of the pole 20 facing away from the first flange 21 has a distance L6 from the first face of the cover plate 10, and T represents a distance between the first face of the cover plate 10 and the second face of the cover plate 10, wherein L6/T is 25% or less and 300%, and L6 is 1mm or less and 10mm or less; the first flange 21 is used for limiting and fixing the pole 20, and preventing the pole 20 from falling out. If L6 is too small, the convenience of assembly can be affected, if L6 is too large, the occupied space can be too much, and the compactness of structural layout is not facilitated to be improved, so that L6 which is 1mm or less is or less than 10mm, the assembly is convenient, and the occupied space can be avoided to be too much.

In one possible embodiment, the distance L6 between the end of the pole 20 facing away from the first flange 21 and the first face of the cover plate 10 can be 1mm, 3mm, 5mm, 8mm or 10mm.

In one possible implementation, L6/T may be 25%, 30%, 50%, 60%, 100%, 150%, 180%, 200%, 250%, 280%, 300%, or the like.

In one possible implementation, the second end of the pole 20 has a second flange 23, and the stop groove 22 may be formed in the outer circumferential surface of the second flange 23. The pole 20 is prevented from coming out by the interference of the second flange 23 with the sleeve portion 31.

Referring to fig. 4, the insulation structure further includes a second insulation member 50, the second insulation member 50 being disposed on the second face of the cap plate 10, the second insulation member 50 extending between the first flange 21 and the cap plate 10; a sealing ring 70 is also provided between the first flange 21 and the cover plate 10. The second insulator 50 separates the first flange 21 from the cap plate 10, prevents the first flange 21 from being in contact with the cap plate 10 to cause a short circuit, and improves safety in use. The first face of the cover plate 10 and the second face of the cover plate 10 are the upper and lower surfaces of the cover plate 10, respectively.

In one possible implementation, the seal ring 70 is integrally connected to the first insulator 30 as a unitary structure. Of course, in other possible embodiments, the seal ring 70 and the first insulating member 30 are separate components.

The second insulating member 50 is provided with a through hole corresponding to the position of the mounting hole 11, the post 20 is inserted into the through hole, the seal ring 70 has a gap L7 between the seal ring 70 and the post 20 in the initial state, and L7 is not less than 0 and not more than 2mm, for example, L7 may be 0.5mm or 1mm. After assembly, the sealing ring 70 is pressed by the first flange 21 and the cap plate 10 such that the sealing ring 70 is deformed and the gap is filled, thereby preventing the gap between the first flange 21 and the cap plate 10, sealing the mounting hole 11, preventing leakage of electrolyte after the cap plate assembly is mounted to the battery, and preventing external dust and rainwater from entering the inside of the battery.

In one possible implementation, the sealing ring 70 may be a rubber ring or a silica gel ring, and the sealing ring 70 is sleeved on the outer peripheral surface of the pole 20, so that the sealing ring 70 is convenient to install, and in addition, a good sealing effect can be achieved in the circumferential direction of the mounting hole 11.

In one possible implementation, referring to fig. 4 and 8, the outside diameter of the burring 32 is D1, and T is the distance between the first face of the cover plate 10 and the second face of the cover plate 10, where: D1/T is more than or equal to 20% and less than or equal to 80%, D1 is more than or equal to 35mm and more than or equal to 10mm; the minimum diameter of the pole 20 is D2, and D1/D2 is more than or equal to 1.1. The molding difficulty of the flanging part 32 is reduced, the strength of the flanging part 32 is ensured, and the flanging part 32 has an effective insulation effect.

In one possible implementation, D1/T may be 20%, 30%, 50%, 60%, 65%, 80%, etc. In one possible implementation, the outer diameter D1 of the burring 32 may be 10mm, 15mm, 20mm, or 30mm. D1/D2 may be 1.1, 1.2, 1.5, 2, 2.5, or the like.

In one possible implementation, the outside diameter D1 of the burring 32 is 20mm or more and D1/D2 is 1.5 or more.

In one possible implementation manner, the first insulating member 30 may be a plastic member assembled into the accommodating space, and the material of the first insulating member 30 may be polyphenylene sulfide PPS, for example, which has the characteristics of high mechanical strength and flame resistance. Of course, the first insulating member 30 may be a plastic member integrally injection molded in the accommodating space by an injection molding machine after the cover plate 10, the pole 20, the first insulating member 30, the second insulating member 50 and the sealing ring 70 are assembled.

In one possible implementation, the material of the second insulating member 50 may be Polypropylene (pp), or may be a polymer insulating material such as PPS or PTFA, which has good insulation.

In one possible implementation, referring to fig. 2, 3 and 7, there may be two mounting holes 11 formed in the cover plate 10, and two posts 20 are disposed in both the mounting holes 11, where one of the posts 20 disposed in one of the mounting holes 11 is a positive output terminal of the battery, and the other post 20 disposed in the other mounting hole 11 is a negative output terminal of the battery.

In one possible implementation, the cover plate 10 is further provided with a liquid injection hole 16 and a explosion-proof hole 14, wherein the liquid injection hole 16 is used for conveniently injecting electrolyte after the battery is assembled, and a cap is arranged on the liquid injection hole 16. An explosion-proof valve 60 is provided in the explosion-proof hole 14.

In one possible implementation, the explosion proof holes 14 and the liquid injection holes 16 are spaced apart from each other. The explosion proof hole 14 and the liquid injection hole 16 may be located between the two mounting holes 11. The construction of the blast hole 14 and the blast valve 60 is conventional and will not be described in detail herein.

The utility model also provides a battery, which comprises a shell, a battery core and the cover plate assembly, wherein the cover plate assembly is connected with the shell, an inner cavity is formed in the shell, and the battery core is arranged in the inner cavity.

One of the two poles 20 of the cover plate assembly is connected with the positive electrode lug of the battery cell through the switching sheet, so that the positive electrode output end of the battery can be formed, and the other pole 20 of the two poles 20 is connected with the positive electrode lug of the battery cell through the switching sheet, so that the negative electrode output end of the battery can be formed.

It should be noted that, the numerical values and numerical ranges referred to in the present utility model are approximate values, and may have a certain range of errors due to the influence of the manufacturing process, and those errors may be considered to be negligible by those skilled in the art. In the description of the present utility model, it should be understood that the terms "center", "length", "width", "thickness", "top", "bottom", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial", "circumferential", etc. are used to indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the referred location or element must have a specific orientation, in a specific configuration and operation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and may be, for example, fixedly attached, detachably attached, or integrally formed; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can lead the interior of two elements to be communicated or lead the two elements to be in interaction relationship. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (17)

1. A cover plate assembly, comprising:

the cover plate (10), the mounting hole (11) has been seted up to cover plate (10), the first face of cover plate (10) is provided with first stop structure (13), first stop structure (13) include recess (132), the tank bottom of recess (132) forms to recess (132) inside bellied step portion (131), the top surface of step portion (131) is transitional surface (133);

the pole column (20), the pole column (20) is arranged in the mounting hole (11), and a containing space is formed between the pole column (20) and the inner wall of the mounting hole (11);

insulation structure, insulation structure will utmost point post (20) with mounting hole (11) separates, insulation structure includes first insulating part (30), first insulating part (30) including set up in sleeve portion (31) in the accommodation space and extend to turn-ups portion (32) of apron (10), turn-ups portion (32) are provided with second stop structure (40), second stop structure (40) with first stop structure (13) block each other.

2. The cover plate assembly according to claim 1, wherein the step portion (131) is connected to an inner wall of the recess (132) on a side close to the mounting hole (11);

the second stop structure (40) comprises a catch (41) extending into the recess (132) and a connection (42) abutting the transition surface (133).

3. The cover plate assembly according to claim 1, wherein the transition face (133) is lower than the first face of the cover plate (10); and/or the number of the groups of groups,

the surface of the transition surface (133) facing the second stop structure (40) is an inclined surface, and the distance between the transition surface (133) and the first surface of the cover plate (10) gradually increases along the radial direction of the mounting hole (11) towards the direction away from the center of the mounting hole (11).

4. A cover plate assembly according to any one of claims 1-3, wherein the edge of the mounting hole (11) is provided with a chamfer portion (12), one end of the transition surface (133) is connected to a side of the chamfer portion (12) remote from the mounting hole (11), and a step is formed between the other end of the transition surface (133) and the bottom surface of the groove (132).

5. A cover plate assembly according to any one of claims 1 to 3, wherein the outer peripheral surface of the pole (20) is provided with a third stopper structure, the inner wall surface of the sleeve portion (31) is provided with a fourth stopper structure, and the third stopper structure and the fourth stopper structure are fitted with each other;

one of the third stop structure and the fourth stop structure is a protruding part (311), and the other one is a stop groove (22).

6. A cover plate assembly according to any one of claims 1-3, wherein a plurality of said first stop structures (13) are provided, and a plurality of said first stop structures (13) are spaced apart from each other in a circumferential direction of said mounting hole (11).

7. A cover plate assembly according to any one of claims 1-3, wherein the distance between the first face of the cover plate (10) and the second face of the cover plate (10) is T, the transition face (133) is lower than the first face of the cover plate (10), and the distance between the transition face (133) and the first face of the cover plate (10) is L1, wherein L1/T is 5-50%, T is 0.2 mm-4 mm, L1 is 0.01 mm-2 mm.

8. A cover plate assembly according to any one of claims 1-3, wherein the dimension L3 of the recess (132) in the radial direction of the mounting hole (11) is ≡0.1mm; and/or the number of the groups of groups,

the dimension of the transition surface (133) along the radial direction of the mounting hole (11) is L2, wherein L2 is more than or equal to 0.1mm and less than or equal to 10mm.

9. A cover plate assembly according to any one of claims 1 to 3, wherein the center angle θ corresponding to each groove (132) is equal to or larger than 20 ° with the center of the mounting hole (11) as the center, and the sum of the center angles θ corresponding to a plurality of grooves (132) is 20% -80% of the circumferential direction 360 ° of the mounting hole (11).

10. The cover plate assembly according to claim 7, wherein a distance between a bottom surface of the groove (132) and the first surface of the cover plate (10) is H1, wherein 10% or less H1/T80% or less, 0.1mm or less H1 3mm or less.

11. The cover plate assembly according to claim 4, wherein a blocking table (15) is formed between two adjacent grooves (132), and the blocking table (15) has a dimension L5 along the radial direction of the mounting hole (11), wherein 0.1mm ∈l5+.10mm;

the spacing between the blocking table (15) and the chamfer part (12) is larger than 0; and/or the number of the groups of groups,

the blocking table (15) is provided with a round angle near one end of the chamfering part (12), and the radius of the round angle is R1, R1 is more than or equal to 0.1mm and less than or equal to 5mm.

12. A cover plate assembly according to any one of claims 1-3, wherein both ends of the pole (20) extend outside the mounting hole (11), the first end of the pole (20) is provided with a first flange (21), and a distance L6 is provided between the end of the pole (20) facing away from the first flange (21) and the first face of the cover plate (10), wherein L6/T is 25% -L6/T is 300% -L6 mm is 1mm < L6 mm.

13. A cover plate assembly according to any one of claims 1-3, wherein the insulating structure further comprises a second insulating member (50), the second insulating member (50) being arranged on the second face of the cover plate (10), the second insulating member (50) extending between the first flange (21) and the cover plate (10); a sealing ring (70) is also arranged between the first flange (21) and the cover plate (10).

14. The cover plate assembly according to claim 13, wherein the sealing ring (70) is of unitary construction integrally connected with the first insulator (30).

15. The cover plate assembly according to claim 7, wherein the burring (32) has an outer diameter D1, wherein: D1/T is more than or equal to 20% and less than or equal to 80%, D1 is more than or equal to 35mm and more than or equal to 10mm;

the minimum diameter of the pole (20) is D2, and D1/D2 is more than or equal to 1.1.

16. The cover plate assembly of claim 15, wherein D1/D2 is ≡1.5.

17. A battery comprising a housing, a battery cell, and a cover assembly as claimed in any one of claims 1 to 16, the cover assembly being connected to the housing and forming an interior cavity within the housing, the battery cell being disposed within the interior cavity.